ripsch



C. W. RIPSCH.

LIFTNGJACK.

APPLICATION man :1111.13.1919.

3 SHEETS-SHEET l.

C. WI RIPSCH.

L'IF'HNG JACK.

APLxcATloN man 1,111.13. 1919. 1,318,801 Patented 001.1411919.

' 3 sHEETssHET 2.

|Q /5 HI if IN VEN TOR. CWA/w55 m P/Psc/ ATTORNEY C. W.V RIPSCH.

LIFTING JACK.-

APPLICATloN FILED JAN. 13. 191s.

Patented 061111919.

3 SHEETS-SHEET 3.

I N V EN TOR. Cxmfs M ffmc/f ATTORNEY g UNITED sTATEs PATENT OEEIOE.

CHARLES w. RIrscH,

or DAYTON, OHIO, AssIGNoR To THn'eJoYcn-CRIDLAND co., 0F DAYTON, OHIO, ACORPORATION OF OHIO.

LIFTING-JACK.k

- lSpeciiication of LetteisPatent. i. Patented 0017;. 14, 1919.

Application filed. January 13, 1919. I Serial No. 270,824.

To all whom t may concern Be it'known that I, CHARLES W. RIrsoH, acitizen of the United States, residing at Dayton, in the county ofMontgomery and State of Ohio, have invented certain new and usefulImprovements in Lifting-Jacks, of which the followingpisa specification,reference being had therein tothe accompanying drawing.

This inventionrelates to lifting jacks and,

more particularly, to screw-operated jacks.

The object of the invention is to provide a lifting jack vwhich will besimple' and com` pact in its construction and easy of Operation, and, tothis end, it is a further object of the invention to provide such alifting jack in which there will be neither gears or other connectingdevices interposed between the operating member, or lever, and thescrew.

It is also an obj ect of the invention to pro` vide such a jack withdevices for positively operating the same to either raise or lower theload; the devices being so constructed and arranged that when one ofthem is oper.`

atedthe other will be automatically moved into an inoperative position.

It is also an obj ect of the invention to provide a jack comprising avertically arranged lifting screw and having the operating leverarranged in a vertical plane and connected with the screw without theuse of gears. 'Other objects ofthe invention will appear as themechanism is described in detail. l

I n the accompanying drawings Figure 1 is 'a vertical sectional 'view`of a jack embodying my invention taken on the line 1-1 y mounted 'onthescrew. AAshere shown the of Fig. 3i; Fig. 2 is a side elevation ofsuch a jack partly in section; Fig. 3 is a transverse sectional viewtaken' on `the line 3--8 of Fig. l; and Fig. t is a top with the capkremoved. K

In these drawings I haveV illustrated onel embodiment of the inventionand haveV shown the same as applied to a screw-operated ack in which thescrew isY heldV against longitudinal movement and serves to yoperate alifting member which comprises a nut thereon and preferably formedintegral therewith a housing 2, the Vupper portion of which, 3, istubular in form and,y constitutes a hollow standard, while the lowerportion is enlargedto receive within the same parts plan view of thejack i of the operating mechanism. Supported on the base l and extendingvertically therefrom, -within the hollow standard 3, isa screw 4 theupper end of which, in the present 1nstance,`extends slightly beyond theupper end of the hollow standard. RigidlyV secured to this screw isatoothed actuating member 5 which isV here shown in the form of `alratchet wheel, the teeth of which are so shaped'that each of them maybe operatively engaged on either side by an Operating dog or pawl.v Inthe construction here shown the screw has a portion extending downwardlybeyond the threads thereof, into an opening in the toothed member 5,which is held agalnstrotation relatively to said screw. A collar 6rigidly secured to the screw below the threads thereof, rests'upon thetoothed member 5 andserves to limit the downward movement of the screwand to form -a firm support therefor. The toothed actuating member 5rests upon the top plate 7 of a ball bearing, which is mounted on thebase 1 within the 'housing 2. The lower surface of the ytoothedactuating member is preferably arranged to receive the plate, and thetwo parts may, `if desired, be rigidly connpected one to the other.Mounted upon the screw, within the hollow standard, is a nut 8, which isheld against rotation, and to which Alongitudinal movement is impartedby the rotatory movement of the screw. The nut may be held againstrotation in any suit-y able manner. In the present instance it isguideway formed in` the housing 2 and standard 3. les here shown, thatpart of the guideway which is formedin the Vlower part of the housingcomprises two inwardly-extending ribs 10 spaced apart to receive the'lug 9 between them, and that part of the guideway which is formed in thereduced upper portion of the housing, or hollow standard, is in the formof an outwardly-ex tending channel 11 which forms a continuation of thespace between the ribs 10 in the lower part of, the housing. The upperpart of this guideway is offset, as shown at l2, so that a' solid'wallis interposed in thepath of the lug 9 to limit the Outward movement ofthe nut and prevent the same being accidentally moved beyond the end ofthe screw. To remove the nut from the housing it must be vmanipulated tocause the lug to move laterally -through the offset portion oftheguideway and then outward beyond the end of the standard. Preferably,the nut is of a relatively short length and has secured thereto alifting member 13 which travels with the nut and serves to raise andlower the load. In the present construction, this lifting member is inthe form o-f a sleeve surrounding the screw and slidably mounted withinthe hollow standard, the lower end of the sleeve being screw-threadedonto the nut and the upper end of the sleeve extending slightly beyondthe end of the screw when the nut is in its lowermost position. Theinner wall of the hollow standard may, if desired, be cut away for aportion of its length so as to reduce the frictional contact between thestandard and the lifting member. As here shown, the upper portion onlyof the hollow standard is in contact with the lifting member. Mountedont-he outer end of the lifting member is a cap or work-engaging member14.

Movement is imparted to the actuating member 5 and the screw by means ofoperating devices arranged on opposite sides thereof and, as here shown,comprising dogs or pawls adapted to engage and operate the actuatingmember and operatively connected with levers, the two pawls being soarranged that when one lever is manipulated its pawl will turn theactuating member in one direction to raise the load, and when the otherlever is manipulated its pawl will turn the actuating member in theopposite direction to cause the load to be lowered. By causing the pawlsto directly engage the toothed actuating member all gearing and allother.

intermediate parts are eliminated and the operating levers are caused toact directly upon the rotatable member of the lifting mechanism. v Thetwo operating mechanisms are identical in construction and arrangementwith the exception that, as stated, the dogs or pawls are reversed. Inthe present construction each operating mechanism is mounted within asupplemental housing 15 which is rigidly secured to the adjacent side ofthe main housing 2 and has an opening through which the lever 1Gprojects. The levers are preferably of the bell crank type and havetheir ends extending into the respective housings, where each lever ispivotally mounted on a pill 17 WllCll S SUP" ported at its outer end inthe wall of the supplemental housing 15 and at its inner end in the wallof the main housing 2. The lower end of the lever is provided with aguideway to receive the dog or pawl and, in the present instance, thisguideway is in the form of an aperture 18 extending through the leverand in which the pawls 19 and 2O are slidably mounted. The wall of themain housing is cut away adjacent to the edges of the actuating member 5to form slots 21 and permit the pawls to engage the respective sides ofthe actuating member. The pawls in the present instance are eachprovided with two teeth but, obviously, any suitable number of teeth maybe used. Each pawl is caused to yieldingly engage the toothed actuatingmember by means of a spring 22 which is mounted in a socket 23 in theouter end or' the pawl, the outer end of which bears against the closurefor the guideway or aperture 18. This closure may be of any suitablecharacter but, in the present instance, the guideway extends entirelythrough the lever and is closed at its outer end by a plate 24 whichbears against an inwardly extending projection or rib 25 formed on theouter wall of the supplemental housing 15, this rib being so arranged asto permit the closure plate 24 to move with the end of the lever as thelatter is actuated. The pawls are held against rotatory movement, andtheir longitudinal movement is limited, by means of stops 26 which arescrew-threaded into the ends of the respective levers and project intogrooves 27 formed in the pawls.

It will be apparent that when one of the levers is operated the pawlcarried thereby will be moved transversely to the axis of the screw, andwill be caused to engage the teeth of the actuating member 5 and thusimpart rotation to the screw. The first movement of the actuating membercauses the pawl carried by the other operating lever to be movedrearwardly out of engagement with the actuating member, in whichposition it is retained by means of a detent, which is here shown ascomprising a springactuated ball 28 which, when the lever is in itsfully retracted position, is seated in a cavity 29 formed in the side ofthe main housing 2.

lVhile I have shown and described one embodiment of the invention, Iwish it to be understood that I do not desire to be limited to thedetails thereof, as various modifications will occur to a person skilledin the art.

Having now fully described by invention, what I claim new and desire tosecure by Letters Patent, is:

l. In a lifting jack, a screw, a nut mounted on said screw, one of saidelements being rotatable, a single actuating member secured to saidrotatable element, and operating devices arranged on opposite sides ofsaid actuatingmember and each having a part arranged to directly engagesaid actuating member, said engaging parts being| so arranged that themanipulation of one of said operating devices will rotate said actuatingmember in one direction and the manipulation of the other of saidoperating devices will rotate said actuating member in the oppositedirection.

2. In a lifting ack, a screw, a nut mounted on said screw, one of saidelements being rotatable, a single actuating member secured to saidrotatable element, and operating devices arranged on the opposite sideof said actuating member and each having a pawl to engage saidgactuatingmember to rotate said rotatable element, said pawls beingvar.- ranged torotate said element in opposite directions. i

. 3. In a lifting ack, a screw, anutmounted on said screw, one of saidelements being rotatable, an actuating member secured to said rotatableelement,a pair of levers, and a part carried by each of said levers andadapted to engage said actuatingniember, said engaging parts beingI soarranged that the manipulation of one leverwill rotate said 4actuatingmember in one direction and the manipulation of the other lever willrotate said actuating member in the opposite direction. Y y v 4f. In alifting jack, a screw, anut mounted on said screw, one of saidv elementsbeing rotatable, atoothed actuating member se-k cured to said rotatableelement, a pair of levers',`a pawl carried by each of said levers andarranged to engage said toothedactuating member, said pawls having theirteeth facing in opposite directions about the circumference of saidactuating member, whereby the manipulation of one of said levers willrotate said actuating member in one direction and the manipulation ofthe other lever will rotate said actuatingmembei' in the oppositedirection. v

5. In a lifting jack, a screw, a nut mount-4 edon said screw, one ofsaid elements being rotatable, a toothed actuating member se-V cured tosaid rotatable element, a pair of levers, each of said levers having aguideway extending transversely tothe axis` of said rotatable element,and a pawl yieldably mounted in each of said guidew'ays and adapted toengage said toothed actuating member, said pawls having their teeth soarranged that the manipulation Vof one of said levers will cause saidactuating` ,member to be rotated in one direction and the manipulationof the other of said levers will cause said actuating member to lberotated -in the oppositedirection. Y Q i 6. Ina lifting jack, a. screw,ainutmounted on said screw, oneof said' elements being rotatable, atoothed actuating member ysecured to said rotatable element, a leverpivotally mounted yalongside of saidfmenn ber on an axis extendingtransversely to the axis thereof and having a guideway Vextend-v ingtransversely to the axis of said rotatable element, and a pawlryieldablyfinountedjin said guideway and arranged toV engage4 the leveris manipulated. n l i 7. In a lifting Jack, a screw, a nut mountteeth ofsaid actuating'member whensaid ed on said screw, one of said elementsbeing rotatable, an actuating member secured to Vsaid rotatable element,operating devices arranged on opposite sides of said actuating memberand each having a part cooperating vwith said actuating member to impartrotary movement to said `rotatable element, said par-ts of the twooperating devices being se arranged that one` operating device will movesaid rotatable element in one direction and the other operating devicewill move said rotatable element in the opposite direction, those partsof said operating devices which engage said actuating member being soarranged that the operation of one of said operating devices will causethe other to be moved into an inoperative position with relation to saidactuating member. y

8. In a lifting ack, a rotatable screw held against longitudinalmovement, a lnut mounted on said. screw and heldagainst rotationtherewith, a lifting member connected with said nut, a single actuatingmember secured to said screw, and operating devices arranged on oppositesides of said screw and having parts directly engaging saidactuatingmember to rotate said screw in opposite directions. y

9. In a lifting ack, a rotatable screw held against longitudinalmovement, a nut mounted on said screw and held against rotationtherewith, a lifting member connected with said nut, an actuating membersecured to said screw, and .operating devices arranged on opposite sidesof said screw and vcoperating, respectively, with said actu ating memberto rotate said screw in opposite directions, said operating devicesbeing sov arranged that the operation of one of them will cause theother to be moved outI of engagementy with said actuatingV mem-- ber.' yy 10.In a lifting jack, a rotatable screw held against longitudinalmovement, a nut mounted on said screw and held against rotationtherewith, a lifting member connected with said nut, anractuating membersecured to said screw, levers mounted on the opposite sides: of ysaidscrew, on an axis extending transversely to the axis of said screw eachlever having a part extending beyond its tion,` and thel manipulationofthe other levern will, rotate saidscrew in the opposite direcy otion.Aw

1l. In lifting jack, a rotatable screw held against longitudinalmovement, a nut.

mounted on saidl screw and held against rotationtherewith, a-liftingmember connect.-

ed with said nut, a toothed actuating member rigidly secured to saidscrew, a lever pivotally mounted on each side of said screw,

each lever having a guideway extending transversely to the axis of saidscrew, and a pawl yieldably mounted in each guideway and arranged toengage said toothed actuating member when the respective levers aremanipulated, said pawls being arranged, respectively, to move saidactuating member in opposite directions.

12. In a lifting jack, a rotatable screw held against longitudinalmovement, a nut mounted on said screw and held against rotationtherewith, a lifting member' connected with said nut, a toothedactuating member rigidly secured to said screw, a lever pivotallymounted on each side of said screw, each lever having a guidewayextending transversely to the axis of said screw, and a pawl yieldablymounted in each guideway and arranged to engage said toothed actuatingmember when the respective levers are manipulated, said pawls beingarranged, respectively, to move said actuating member in oppositedirections, and being also so arranged that the manipulation of one ofsaid levers will cause the pawl of the other lever to be moved out ofengagement with said actuating member.

13. In a lifting jack, a rotatable screw held against longitudinalmovement, a nut mounted on said screw and held against rotationtherewith, a lifting member connected with said nut, a toothed actuatingmember rigidly secured to said screw, a lever pivotally mounted on eachside of said screw, each lever having a guideway extending transverselyto the axis of said screw, and a pawl yieldably mounted in each guidewayand arranged `to engage said toothed actuating member when therespective levers are manipulated, said pawls being arranged,respectively, to move said actuating member in opposite directions, andbeing also so arranged that the manipulation of one of said levers willcanse the pawl of the other lever to be moved out of engagement withsaid actuating member.

1st. In a lifting jack, a rotatable screw held against longitudinalmovement, a nut mounted on said screw and held against rotationtherewith, a lifting member connected with said nut, a toothed actuatingmember rigidly secured to said screw, a lever pivotally mounted on anaxis extending transversely to said screw and having a part extendingbeyond its axis, and a pawl yieldably mounted on said part of said leverand adapted to engage said actuating member to rotate said screw. y

15. In a lifting jack, a rotatablerscrew held against longitudinalmovement, a nut mounted on said screw and held against rotationtherewith, a` lifting member co-nnected with said nut, a toothedactuating member rigidly secured to said screw, a lever pivotallymounted on an axis extending transversely to said screw and having apart extending beyond its axis, said part of said lever having aguideway, a pawl mounted in said guideway, and means to hold said pawlyieldably in engagement with said actuating member when said lever ismanipulated.

16. In a. lifting` jack, a rotatable screw held against longitudinalmovement, a nut mounted on said screw and held against rotationtherewith, a lifting member connectedv with said nut, a toothedactuating member rigidly secured to said screw, a lever pivotallymounted on an axis extending transversely to said screw and having apart extending beyond its axis, said part of said lever having anaperture therein extending transversely to the axis of said screw, apawl slidably mounted in said aperture, and a spring arranged withinsaid aperture to hold said pawl yieldably in engagement with saidactuating member.

17. In a lifting jack, a base, a housing carried by said base and havinga tubular portion forming a standard, a screw rotatably mounted on saidbase and extending through said standard, a ratchet wheel secured tosaid screw, a nut mounted on said screw within said standard and heldagainst rotation relatively to said screw, a lifting mem-ber connectedwith said nut and extending beyond the end of said standard, asupplemental housing secured to the side of said first-mentionedhousing, a lever pivotally mounted within said supplemental housing, anda pawl carried by said lever within said supplemental housing forimparting rotatory movement to said screw when said lever ismanipulated.

18. In a lifting jack, a base, ahousing carried by said base and havinga tubular portion forming a. standard, a screw rotatably mounted on saidbase and extending through said standard, a nut mounted on said screwwithin said standard and lield against rotation relatively to saidscrew, a lifting member connected with said nut and extending beyond theend of said standard, an actuating member secured to said screw, asupplemental housing mounted on one side of said first-mentionedhousing, aI lever pivotally mounted within said supplemental housing andhaving a guideway extending transversely to said screw, and a pawlyieldably mounted in said guideway to coperate with said actuatingmember to rotate said screw'. 1

19. In a lifting jack, a base, a housing carried by said base and havinga tubular portion vforming a standard, a screw rotatably mounted on saidbase and extending through said standard, a nut mounted on said screwwithin said standard and heldv against rotation relatively to saidscrew, a lifting member Connected with said nut and extending beyond theend of said standard,

an actuating member connected with said screw, a supplemental housingmounted on one side of the first-mentioned housing, a lever pivotallymounted within said housing and having an aperture extendingtransversely to the axis of said screw, a plate seated on said lever toclose the end of said aperture, said supplemental housing having a ribto engage said plate and hold the same in place when said lever ismanipulated, a pawl slidably mounted in said aperture, and a springconfined between said pawl and said plate to hold Asaid pawl yieldinglyin engagement with said actuating member.

20. In a lifting jack', a base, a housing carried by said base andhaving a tubular portion forming a standard, a screw rotatably mountedon said base and extending through said standard, a nut mounted on saidscrew within said standard and held against'rotation relatively to saidscrew, a lifting member connected with said nut and extending beyond theend of said standard, an actuating member connected with said screw, asupplemental housing arranged on each side of the first-mentionedhousing, a lever pivotally mountedY in each supplemental housing, eachlever hc ving a part extending beyond the axis thereof and provided witha guideway, and a pawl mounted in each guideway, and means for holdingsaid pawls yieldingly in engagement with said actuating member when therespective levers are manipulated. n f Y 21. In a lifting jack, a ibase,a housing carried by said base and having a tubular portion forming `astandard, a screw rotatably mounted on said base and extending throughsaid standard, a nut mounted on said screw within said standard and heldagainst rotation relativelyto said screw, a lifting member connectedwith said nut and extending beyond the end of said standard, anactuating member connected with said screw, a supplemental housingarranged on each side of the first-mentioned housing, a lever pivotallymounted vin'each' supplemental housing, each lever having a partextendingbeyond the axis thereof and provided with 'a guideway, and akpawl mounted in each guideway, means for holdingv said pawls yieldinglyin engagement with said actuating member when the respective levers aremanipulated, and a detent carried by each lever toy hold the same in aninoperative position.

22. In a lifting jack, a base, a housing extending upwardly from saidbase andhaving a tubular portion forming` a standard, a th'rust bearingmounted on said base within said housing, a ratchet wheel mounted onksaid bearing, a screw mounted on said ratchet wheel and rigidly securedthereto,

Y lifting member actuated by said screw, an

operating lever mounted for movement in a vertical plane, an actuatingpart carried by said screw, and a part carried by said lever to engagesaid actuating part on said screw and impart rotatory movement to saidscrew. y Y 24. In a lifting jack, a screw, a nut mounted on said screw,one of Said elements being rotatable, an actuating member secured tosaid rotatable element, levers mounted on opposite sides of saidactuating member-for movement about axes extending transversely to v'theVaxis of saidrotatable member, and parts connectedY with said levers tocause said actuating member to be rotated in opposite directions bytherespective levers.

25. In a lifting jack, a screw, a nut mounted on said screw, one of saidelements being rotatable, a toothed actuating member secured to saidrotatable element, levers mounted at opposite sides of said actuatingmember for movement about axes extending transversely to the axis ofsaid rotatable member, and pawls mounted on said levers to cooperatewith said toothed actuating member, said pawls being so arranged thatthe manipulation of one lever will rotate said actua-ting member in onedirection and the manipulation of the other lever will rctate saidactuatingmember in the opposite direction.

26. In a. lifting ack, a screw, a nut mounted on said screw, one of saidelements being rotatable, a toothed actuating member secured to saidrotatable element, a lever pivotally mounted on each side of said screw,each lever having a guideway extending transversely to the axis of saidscrew, and a pawl yi'eldably mounted in each guideway and arranged toengage said toothed actuating member when the respective leversaremanipulated, said pawls being arranged respectively to move saidactuating member in Y opposite directions,

Intestimony whereof, I affix my signature hereto.

cuantas w. RirscH,

Copies of this patent may be obtained for five cents each, byaddressingl the Commissioner of Patents,

Washington, 1).,0. l

